Fond diffus cosmologique (CMB)

Thèse 2024-2027 – A la recherche de nouvelle physique avec les premières données cosmologiques du Simons Observatory

Auteur/autrice de la publication :robinet
Publication publiée :30 octobre 2023
Post category:A2C Fond diffus cosmologique (CMB)Thèses

Description du sujet de thèse en anglais In April 2024, the Simons Observatory’s (SO) [1] large aperture telescope will obtain its first light. This telescope, equipped with a 6m primary…

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Cosmological parameters derived from the final (PR4) Planck data release

Auteur/autrice de la publication :tristram
Publication publiée :25 octobre 2023
Post category:A2C Fond diffus cosmologique (CMB)Publication

We present constraints on cosmological parameters using maps from the last Planck data release (PR4). In particular, we detail an upgraded version of the cosmic microwave background likelihood, HiLLiPoP, based…

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Improved limits on the tensor-to-scalar ratio using BICEP and Planck

Auteur/autrice de la publication :tristram
Publication publiée :15 décembre 2021
Post category:A2C Fond diffus cosmologique (CMB)Publication

We present constraints on the tensor-to-scalar ratio r using a combination of BICEP/Keck 2018 and Planck PR4 data allowing us to fit for r consistently with the six parameters of…

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Improved constraint on the primordial gravitational-wave density using recent cosmological data and its impact on cosmic string models

Auteur/autrice de la publication :robinet
Publication publiée :8 janvier 2015
Post category:A2C Fond diffus cosmologique (CMB)Ondes gravitationnelles Publication

Abstract: (IOP) The production of a primordial stochastic gravitational-wave (GW) background by processes occuring in the early Universe is expected in a broad range of models. Observing this background would…

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